In this breach of contract case, the Law Division judge dismissed with prejudice plaintiff's complaint by imposing the ultimate discovery sanction provided in Rule 4:23-5. This court reversed and remanded this matter for further proceedings because the party who filed the motion and the Law Division judge who imposed the sanction failed to follow the procedural safeguards codified in Rule 4:23-5. The attorney representing the moving party did not disclose to the motion judge that he had received the outstanding discovery which formed the basis of the sanction a month before the judge dismissed plaintiff's complaint with prejudice. This wholesale disregard for the due process protections embodied in Rule 4:23-5 can occur only when the trial court fails to perform its basic gatekeeping function.